Upon entering further in, she could now vividly discern what Anthony who seemed as busy as a beaver was significantly occupied with. She guessed that Anthony must have percept that she was there already, but he apparently seemed to not literally care about whether Flower would care or not care about what he was doing.
Be it as it may, what he thinks or doesn't think does not really matter to Flower either. She only took absolute interest in what he was doing because it involved the big, heavy treasure chest which she had sensed in the room beforehand. Initially Flower had basically pondered about what could've been hidden in the treasure chest, why it was jammed with a padlock and why it was so heavy when she attempted to lift it.